Updated Sunday evening.....Quick update here on the snow chances from the Weather Prediction Center. The blue line indicates a SLIGHT RISK for heavy snow Tuesday night and Wednesday.

This is the first system coming in for late Tuesday night and Wednesday morning. The computer models range from a half inch to several inches.

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The WPC has issued a SLIGHT RISK for heavy snow... 4 inches... for portions of southern Indiana. The green area is the slight risk and includes.....New AlbanyJeffersonvilleCorydonPaoliSalemBedford, IN.

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NWS Louisville says.... After running through the various model blends, leaning toward those that are doing better in this longer range for QPF and PoP, have come up with 1-3" snowfall totals through the daytime period Wednesday. Still plenty of time to watch this system, but an impactful snow is looking more and more likely.

NWS Louisville says this about the second system..... Current forecast low track for the GFS is consistent with our current forecast for midweek snow (south KY getting less), whereas the 00Z ECMWF is farther south. The 12Z version matches up with it`s peer in the GFS. The GEM is an outlier, going with a slower solution that spins up a stronger low over central TN. The GFS and Euro both take the low Friday morning and transition it to a coastal low.

Another factor to consider is it harder to get advisory-level snow when the AO goes out of the negative range, especially during a strong El Nino, and the Euro/GFS both are showing a sharp trend to rising AO values by the end of the work week. The AO signal doesn`t say as much for other types of wintry precip.

Hard to ignore the deformation band each of the models is showing roughly along and north of a SDF/LEX line, which if true could dump another impactful snow up there. As with the midweek system, given time out for the models to change will continue just to go with a rain/snow mix and iron out the details as the forecast day approaches.

The WPC precip. for this week has .75" to 1.00" for Louisville. If this is all snow that would be 7 to 10 inches of snow. Less if there is some rain which there probably will be..